Ultra-tough room temperature intrinsic self-healing elastomer material with high light transmittance and preparation method thereof

A technology of elastomer materials and high light transmittance, applied in the field of elastomer materials, can solve the problems that it is difficult to balance mechanical properties and self-repair effects, cannot achieve ultra-high repair efficiency, and cannot meet application scenarios, etc., to achieve excellent self-repair Capability, stable repeatability, and high productivity

Active Publication Date: 2021-11-30
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it cannot achieve ultra-high repair efficiency at room temperature, making it unable to meet many application scenarios
Reversible non-dynamic covalent bonds mainly include hydrogen bonds, ionic polymers, etc. Based on reversible non-dynamic self-healing materials, there is often a balance between their mechanical properties (modulus and toughness) and dynamic self-healing properties. It is difficult to take into account its mechanical properties and self-healing effect, which greatly limits the practical application and promotion of this type of material

Method used

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  • Ultra-tough room temperature intrinsic self-healing elastomer material with high light transmittance and preparation method thereof
  • Ultra-tough room temperature intrinsic self-healing elastomer material with high light transmittance and preparation method thereof
  • Ultra-tough room temperature intrinsic self-healing elastomer material with high light transmittance and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0040]A method for preparing a super-tough room temperature intrinsically self-healing elastomer material with high light transmittance, the specific steps are as follows:

[0041] a. Under an inert gas atmosphere, 6.9 g of toluene diisocyanate-terminated polypropylene glycol (molecular weight: 2300) was dissolved in 20 mL of N, N'-dimethylformamide solvent to prepare mixed solution I;

[0042] b. Dissolve 0.485g of isophoronediamine in 10mL of N,N'-dimethylformamide solvent to prepare the mixed solution II, and then add the mixed solution II dropwise at 0-4°C to prepare in step a In the obtained mixed solution I, the dropping rate was 1000 μL / min, and the stirring reaction was carried out for 10 h to obtain the initial reaction product solution III, wherein the molar ratio of toluene diisocyanate-terminated polypropylene glycol to isophorone diamine was 100:95;

[0043] c. heating the initial reaction product solution III prepared in step b at 85° C. for 4 hours to obtain the...

Embodiment 2

[0047] A method for preparing a super-tough room temperature intrinsically self-healing elastomer material with high light transmittance, the specific steps are as follows:

[0048] a. Under an inert gas atmosphere, dissolve 6.9 g of toluene diisocyanate-terminated polypropylene glycol in 20 mL of N,N'-dimethylformamide solvent to prepare a mixed solution I;

[0049] b. Dissolve 0.485g of isophoronediamine in 10mL of N,N'-dimethylformamide solvent to prepare the mixed solution II, and then add the mixed solution II dropwise at 0-4°C to prepare in step a In the obtained mixed solution I, the rate of addition was 1000 μL / min, and the reaction was stirred for 10 hours to obtain the initial reaction product solution III. Wherein the mol ratio of toluene diisocyanate-terminated polypropylene glycol and isophorone diamine is 100:95;

[0050] c. heating the initial reaction product solution III prepared in step b at 70° C. for 6 hours to obtain the initial reaction product solution ...

Embodiment 3

[0054] A method for preparing a super-tough room temperature intrinsically self-healing elastomer material with high light transmittance, the specific steps are as follows:

[0055] a. Under an inert gas atmosphere, dissolve 6.9 g of toluene diisocyanate-terminated polypropylene glycol in 20 mL of N,N'-dimethylformamide solvent to prepare a mixed solution I;

[0056] b. Dissolve 0.511g of isophoronediamine in 10mL of N,N'-dimethylformamide solvent to prepare mixed solution II, and then add mixed solution II dropwise at 0-4°C to prepare in step a In the obtained mixed solution I, the rate of addition was 1000 μL / min, and the reaction was stirred for 10 hours to obtain the initial reaction product solution III. Wherein the mol ratio of toluene diisocyanate-terminated polypropylene glycol and isophorone diamine is 100:100;

[0057] c. heating the initial reaction product solution III prepared in step b at 90° C. for 3 hours to obtain the initial reaction product solution IV;

...

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Abstract

The invention discloses a super-tough room temperature intrinsic self-repairing elastomer material with high light transmittance and a preparation method thereof. The structural formula of the material is 10≤n≤60. The material is formed by polycondensation of isophorone diamine, toluene diisocyanate-terminated polypropylene glycol and small molecule monohydric alcohol. First, the toluene diisocyanate-terminated polypropylene glycol is dissolved in N,N'-dimethylformamide In the process, add isophorone diamine and small molecule monohydric alcohol respectively, mix and polycondense to obtain a polymer solution, and finally remove the solvent. The intrinsic self-healing elastomer material of the present invention can complete the repair process at room temperature, has high transparency, can be stretched to about 20 times its original length, and has excellent toughness.

Description

technical field [0001] The invention belongs to the technical field of elastomer materials, and relates to a super-tough room temperature intrinsic self-repairing elastomer material with high light transmittance and a preparation method thereof. Background technique [0002] As early as the 1980s, the U.S. military proposed the concept of bionic smart materials, which have self-healing capabilities similar to the damage repair of living bodies. Professor S.R.White of the University of Illinois in the United States first proposed a microcapsule implanted polymer self-repair model in 2001 based on the concept of a passive mode implanted self-repair system, and reported the results on the world's top journal Nature, which has attracted a lot of attention. There has been widespread interest in self-healing materials in the scientific community. The system uses dicyclopentadiene (DCPD) as a repair agent (wrapped in microcapsules), benzylidene-dichloro-bis(tricyclohexylphosphine)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/78C08G18/32C08G18/30
CPCC08G18/282C08G18/3234C08G18/7843
Inventor 傅佳骏王东徐建华任尚阳
Owner NANJING UNIV OF SCI & TECH
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